I have never been impressed with stock Gingerbread. Froyo was leaps and bounds better than its predecessor, but GB, meh.
But I think the argument presented was more that ICS may be rushed and not ready for prime time and that releasing the Vigor with an established OS may be initially preferred. I know I would prefer this as VZW has a history of being stupidly hard on passing devices through that don't meet their QA standards. Though I think those days pretty much passed when RIM stopped being the dominat devices in their line-up.